REDESCRIPTION OF <i>CANTHOCAMPTUS LATUS</i> BORUTZKY 1947 (COPEPODA, HARPACTICOIDA, CANTHOCAMPTIDAE) FROM LAKE BAIKAL

Abstract

An illustrated redescription of both female and male of Canthocamptus latus Borutzky 1947, a mass endemic species of harpacticoid from the littoral zone of Lake Baikal, which plays important roles in the food chains of shallow waters, is given based on newly collected material. This species is well distinguished from other endemic Baikal species of the genus Canthocamptus Westwood 1836 in the structure of the caudal rami and swimming legs. Morphologically, the species is similar to Canthocamptus bulbifer Borutzky 1947. Information on the neotype is presented, because type material was lost. The morphology of this species was studied in detail using scanning electron microscopy for the first time. Illustrated descriptions of the mouthparts and antennules are given, and the description of the swimming legs is expanded. The structure of the genital field is shown, and data on morphological variability are presented.